Stay-log.



No- 828,065. PATENTED AUG. '7, 1906. E. P. SMITH & E. A. BRINER. STAY LOG.

APPLICATION FILED JUNE 3.1905.

' EM'IL A. BRINER, citizens vuNrTin) sTATns PATENT onirica.

EDWIN F. SMITH AND EMIL NIA, ASSIGNORS TO EDWIN F.

A. BRINER, 0F PHILADELPHIA,- PENNSYLVA- SMITH COMPANY, OF PHILADELPHIA,

Specification of Letters Patent.

Patented Aug.A 7, 1906'.

Application led June 3,1905. Serial 1%,.2631580Q.-

.T0l all whom t may con/cern:

Be it known that we, EDWIN F. SMITH and of the United States, residing at Philadelphia, in the county of Philadelphia and State'of Pennsylvania, have invented certain new and useful Improvements in Stay-Logs, of-which the following is a specification, reference being had therein to thel accompanying drawings, forming apart thereof.

Our invention relates to stay-logs or loge carriers for slicing or veneer-cutting machines, and has for its objects economy of material in the slicing or cutting operation and utilization of material heretofore discarded and' also ease and rapidity of insertion and attachment of logs or sections thereof, simplicity and economy of construction, and effectiveness of operation.

In the work of slicing and cutting veneer and thinl stuff as at present carried on a great amount of valuable lumber is discarded as unfit for the cutting or slicing operation, not only the cores, which have been cut down as far as practicable in the usual rotary cutters, but also the logs or timber of comparatively small diameter and which are too small for thel rotary cutting-machines Although numerous stay-logs have been heretoforel devised for the half-rotary cutting operation, Wherein'- a section of a log is supported and rotated' onV an axis exterior to the log-section, these stay-logs have been of limited use and not adapted for gripping small logs or cores, and the great waste of valuable lumber above referred to has not been prevented by the use of any such contrivances.

Our invention aims to provide a stay-log which willreadily grip and hold all pieces of lumber, whether'round logs, cores, halfl sections, quarter-sections, 0r of any irregular shape and whichv will rotate these logs or sections so-that they may be acted upon by cutting or slicing knives and the veneer or thin stuff cut therefrom, thereby permitting the utilization of any core or small log containing suiiicient material and also producing thin material or veneer with a quartered cut, and thus of the most valuable kind as contrasted with the cut produced by the rotation'- of a log on its own axis, such cut being circumferential to the log and* of inferior grain and appearance.

y We will now describethe stay-log embody-- ends of the shaft, as shown.

Figure l is a side elevation, partlyin! seca l tion, on a plane indicated by theline 1 1, Fig.Y

2. Fig. 2 is an endz elevation of the same,

:showing three' logs-'clamped therein' andf partly. cut. Fig. 3i is ant enlarged sectionalview of the` upper part of the stay-log, taken in* a plane indicated by the line 3, Fig. l.

Upon both ends of a shaft 1, which maybe hollow, as shown, the end hubs 2 and 3 aret tightly fitted, as by screwing them overth'e 3 are provided with tapering rectangular bores, as usual, to permit the stay-log tol be carried bythe rotating centers of aslicing or cutting machine;

End spiders 4 and 5 are provided, each' shown as consisting of an outer and inner rim and arms joining the two rings, andi the* inner rims are shownvv as bolted* to' the' endi hubs. In the construction shown", Whereini three clamps are provided, each spideris provided withl six arms, and to each alternate arm and its `adjacent portion of the outer ring a fixed clamping-frame 1"() is secured, as

by bolts, as shown, this-clamping-frame' con-v The'hubs 2r and sisting of an L-shaped beam running:k the full lengthl of the distance betweenthel spiders and with end flanges 11 for the bolts, whereby it is secured at each end to one ofthe spiders. The fixed clamping-blade 141 of each clamp' is set into al recess in thev outer face of its fixed clamping-frame and is sui-tably secured therein, as by countersunlr` screws, as shown in: Fig. 31, and' the outer face of the blade is flushl withthe outerf-'ace of the clampingeframe. Thev gripping edge of thisxed clamping-blade isshcwn-as pro'- vided with-squareeshaped teeth L5, which are equidistantly spaced along thex entire length of its gripping edge.

The moving clamping-blades 1=6e aneoiithe l same construction as the fixedl clampingblades 14. and are similarly set with' a flush: finish into-recesses in the movable clampingframes 17.. Each movable clalmpn #frame 17 extends substantially the full istance between the inner faces of the: spiders, with sufficient clearance, however', for freedom; of movement, and is carried by radial arms, to

which it is shown as secured by bolts, these arms for each clamping-frame consisting of two end arms 19 and two medial arms 18, each arm having its own hub 20 and the twelve separate hubs Jfor the twelve arms of the three clamping-frames being loosely and independently fitted to rotate upon the central shaft 1. Between the two intermediate arms of each movable clamping-frame a threaded pivot-block 22 is located, the ends of this pivot-block entering bearings in the arms. A clamping-screw 23, provided at one end with a right-hand screw-thread and at the other end with a left-hand screw-thread is shown as provided Jfor each clamp arranged with its left-hand screw-threaded part engaged in the pivot-block 22 and its righthand screw-threaded part engaged in another pivot-block 27, which is pivoted in bearings provided by the adjacent faces or brackets 30, which are bolted to the ixed clamping- Jframe 10. An opening 26 is provided in each ixed clamping-frame for the `tree passage of the clamping-screw 23, and the clampingscrew 23 is shown as squared at its end for convenient operation. By reason of the provision of right and left threads the rotation of each clamping-screw will cause its movable clamping-frame to approach to orrecede from its fixed clamping-frame, thereby opening or closing the jaws formed by the clamping-blades 14 and 16.

A back support or rest is provided for each clamp coperative with the clamping-jaws and adjustable to nicely determine the gripping-points of the clamping-jaws. Each of these adjustable back supports consists of a beam-shaped casting 32, which extends longitudinally almost the entire distance between the spiders and has a lat face bearing against the adjacent side tace of the fixedV clampin -irame 1() and has an outer face 35 arrange angularly thereto and tangentially to a circumference described from the center of rotation of the stay-log, these two Jfaces being upon angular flanges which are braced at intervals by strengthening-ribs and the ilange which bears against the side face of the stationary clamping-frame being partly cut away to save weight and also to provide clearance for the clamping-screw 23 and also taperin toward its ends to economize material wit out sacrifice of strength. Adjustment-screws 33 enter threaded bosses of the back supports and are iitted to rotate in bearing-blocks 38, which `are shown as provided with pivotal connections with the fixed clamping-frames, the pivotal connection for each bearing-block 38 being provided by a pivot-pin 39, projecting from the bearingblock and passing through the iixed clamping-trame and having a nut bearing against the opposite Jface of the ixed clamping-frame. (See Fig. 3.) The inner end of each adjustment-screw 33 is provided with a hand-wheel 40, iixed thereon. The boss of each handwheel 40 bears against one face of its bearingblock 38, and the screw has an enlargement or collar 41, which bears against the opposite face of its bearing-block 38, so as to prevent end movement of the adjustment-screw and so that the rotary movement of the handwheel will cause the back support to be thrust inward or outward. Two adjustmentscrews are shown as provided Jfor each back support 32, and the pivotal connections of 'their bearing-blocks permit one to be advanced ahead of the other without jamming.

ln the operation of the machine the logs or sections of logs are most conveniently inserted with the clamping-jaws in their upper position, as the log or section may then be laid upon the back support 32 and the back support adjusted by manipulation of the handwheels 40 so as to bring the log or section in proper position for the clamping of the log or section, so as to permit the greater part or the desirable part of the log or section to be sliced, and thus the clamping-points may be nicely determined by the adjustment of the back support. Thereafter the clampingscrew 23 is actuated to cause the clampingjaws to close and to firmly grip the log or section between the clamping-blades. The other two clamps may then be similarly provided with logs or sections of logs, and the slicing operation may then be carried on in the usual manner by rotating the entire staylog, so as to eiiect orbital revolution of the clamping-jaws and the logs held thereby. The slicing operation may be continued until the wood has been sliced off down to the clamping-jaws, thus permittin the utilization of practically all of the desirable part of the lumber.

It is obvious that various modifications may be made in the construction shown and above particularly described within the principle and scope of our invention'.

What we claim, and desire to secure by Letters Patent, is

1. A stay-log adapted to receive rotary motion and comprising orbitally-revoluble clamping-jaws, an adjustable back support coperative with the clamping-jaws and rotatable with the clamping-jaws, and means for movin the clamping-jaws toward each other in a irection transverse to their axis of revolution to grip the work laterally.

2. A stay-log adapted to receive rotary motion and comprising two clamping-jaws, one of which is pivotally mounted at the axis of rotation of the stay-log, and 'means for moving the clamping-jaws toward each other to grip the work.

3. A stay-log adapted to receive rotary motion and comprising a clamping-j aw iixed thereon, another clamping -jaw pivotally IIC mounted at the axis of rotation thereof, and means for moving the clamping-jaws toward each other to grip the work.

LA stay-log adapted to receive rotary motion and comprising two clamping-jaws, one of which is pivotally mounted, an adjustable back support cooperative with the clamping-jaws, and means for moving the clamping-jaws toward each other to gri the work. j

5. A stay-log adapted to receive rotary motion and comprising a clamping-j aw fixed thereon, an adjustable back support slidably movable thereon, another clamping-jaw pivotally mounted at the axis of rotation of the stay-log, and means for moving the clamping-jaws toward each other to grip the work.

6. The combination of a clamping-frame rotatably mounted and a clampingjaw thereon, a back support slidably movable upon the clamping-frame, means for adjusting the back support, another clampingframe pivotally mounted relatively to the first-mentioned clamping-frame and a clamping-jaw thereon, and means connecting the clamping-frames for moving the jaws toward each other to grip the work.

7. The combination of end pieces adapted to engage rotating centers, a plurality of clamping-frames secured to the end pieces, clamping-jaws upon the clamping-frames, back supports slidably movable upon the clamping-frames, means for adjusting the back supports, a central shaft secured to the end pieces, clamping-frames pivotally mounted upon the central shaft, clamping-jaws upon the pivotally mounted clampingframes, and means connecting the clampingframes for moving the jaws toward each other to grip the work, substantially as described.

8. A stay-log adapted to receive rotary motion and comprising a plurality of pairs of clamping-jaws and means for moving the clamping-jaws toward each other to grip the Work, one clamping-jaw of each pair being pivotally mounted at the axis of rotation of the stay-log.

In testimony whereof We have affixed our signatures in presence of two witnesses.

EDWIN F. SMITH. EMIL A. BRINER. Witnesses:

T. B. SUZIER, CHAs. L. NAYLOR. 

